Triax Gear Premium LS 80W-90 Gear Oil - Wide-Spec Protection

In this review the Triax Gear Premium LS 80W-90 is presented as a practical choice for owners of manual transmissions, hypoid gear systems and limited slip differentials who want broad compatibility and long component life. The bottom line: this gear oil's widest spec range and built-in limited slip additive make it a single-bottle solution for many differingials and axle assemblies, and its formulation emphasizes shear stability and scuffing protection that matter in severe service applications.

Key Features

• Widest compatibility: Works with a very large number of hypoid gear systems, differentials, transmissions and axle assemblies so fewer fluid changes or product swaps are required.
• Built-in limited slip additive: Includes optimized LS chemistry so no separate additive is necessary for limited slip differentials, including units with wet brakes.
• Severe service stability: Formulated for exceptional shear stability and oxidation resistance to maintain viscosity and film strength under high load and high temperature.
• Outstanding scuffing protection: The proprietary polyphosphate EP additive system exceeds heavy extreme pressure requirements for long gear and synchronizer life.
• High load capacity: Exceeds Load Stage 13 extreme pressure requirements and protects gears under heavy torque and shock loading.

Who It's For

The Triax Premium LS 80W-90 suits owners of trucks, SUVs and vintage vehicles that use hypoid gears or limited slip differentials and need a robust, shear-stable oil that meets a broad range of OEM specs. It is also a good choice for fleet operators and technicians who prefer a single product to cover many axle and transmission types.

Those who should look elsewhere include users requiring synthetic-only formulations for extreme low-temperature starts or those who need a product explicitly labeled for a narrow modern OEM specification not listed here; for such specialized cases an OEM-specific gear oil may be a better match.

Pros & Cons

Pros

• Broad application range reduces the need to stock multiple gear oils.
• Built-in limited slip additive removes the extra step of adding LS friction modifier.
• Excellent shear and thermal stability helps preserve viscosity and film strength in severe service.
• Strong scuffing protection and EP performance protect gears and synchronizers for long service life.

Cons

• Not marketed as a full synthetic option, so users seeking a specific synthetic formulation should verify suitability.
• Labeling focuses on wide compatibility rather than listing every OEM spec, so technicians should confirm fit for unique OEM requirements.

Specifications

Product Type	Gear oil for hypoid gears and differentials
Viscosity	80W-90
Limited Slip Ready	Built-in LS additive, no extra additive required
Performance Additive	Polyphosphate EP proprietary system
Service Strength	Severe service, shear stable, high thermal stability
Extreme Pressure	Exceeds Load Stage 13 (beyond 120,000 lbs/sq in)
Container Size	1 gallon

Our Verdict

The Triax Gear Premium LS 80W-90 is a practical, value-oriented choice for anyone needing a single, reliable gear oil that covers many hypoid gear systems and limited slip differentials. Its built-in LS chemistry and strong shear stability make it especially valuable for vintage trucks, fleets and severe service use where compatibility and long transmission life matter.

Frequently Asked Questions

Is an extra limited slip additive required?
No, the product contains a built-in limited slip additive optimized for limited slip differentials, including those with wet brakes.

Can this oil be used in manual transmissions and differentials?
Yes, it is formulated for manual transmissions, hypoid gear systems and differentials and is presented as widely compatible across many assemblies.

Is this suitable for severe service and high load use?
Yes, the oil emphasizes shear stability, oxidation resistance and exceeds Load Stage 13 extreme pressure requirements for heavy-duty protection.